obsolete influenza virus pneumonia true DOID:10510 disease_ontology A viral infectious disease that results_in inflammation located_in lung, has_material_basis_in Influenza A virus, has_material_basis_in Influenza B virus, or has_material_basis_in Influenza C virus, which can directly damage the respiratory epithelium, allowing free access to invading bacteria. The mucous membranes are covered with foamy, bloody fluid from the pulmonary edema in the more acute cases. Interstitial fibrosis has been observed. The infection has_symptom cough, has_symptom pain in the chest and throughout body, has_symptom headache, has_symptom weakness, and has_symptom chills. influenza pneumonia influenzal pneumonia